Dissolution of Oxide Films on Aluminum in Near Neutral Solutions

Conference · Sun Oct 17 00:00:00 EDT 1999

OSTI ID:770784

Isaacs, Hugh S; Xu, Feng; Jeffcoate, Carrol S

Simple linear potentiodynamic cycling measurements have been made on abraded pure Al in borate, chromate, phosphate, sulfate and nitrate solutions. In borate and chromate solutions the currents continued to decrease with each subsequent cycle. In phosphate dissolution of the oxide takes place producing repetitive repeat curves. The current variations in borate and chromate were simulated using a high field conduction oxide growth model. Including oxide dissolution in the model simulated the phosphate behavior. Results in sulfate and nitrate solutions were more complex. The behavior in the sulfate solution was attributed to effects of sulfate the oxide/solution interface.

• Research Organization: Brookhaven National Lab. (BNL), Upton, NY (United States)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 770784
• Report Number(s): BNL-67061; R&D Project: AS-010-MSD; KC-02-01-02; TRN: US200432%%259
• Resource Relation: Conference: 196. Meeting of the Electrochemical Society, Honolulu, HI (US), 10/17/1999--10/22/1999; Other Information: PBD: 17 Oct 1999
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM
BORATES
CHROMATES
DISSOLUTION
NITRATES
ALUMINIUM OXIDES
PHOSPHATES
SULFATES
PH VALUE
CORROSIVE EFFECTS